U.S. Cellular Selects iPhonebook™ Wireless BREW Application To Help Make Customer's Lives Easier

iPhonebook To Wirelessly Link Address and Phone Number Information to U.S. Cellular easyedgeSM Subscribers

San Jose, California - October 1, 2003 - U.S Cellular, (AMEX: USM) one of the nation's largest wireless service carriers, and Xpherix Corporation, the leader in personalized mobile connectivity, today announced that iPhonebook is now available through U.S. Cellular's newly-launched easyedge Enhanced Wireless Phone Service. iPhonebook wirelessly links content from Microsoft Outlook®, Outlook Express® or Palm ™ software to mobile phones.

U.S. Cellular selected iPhonebook for trials earlier this year as the company began exploring the types of applications it would later launch on it's newly designed BREW (Binary Runtime Environment for Wireless) platform, easyedge Enhanced Wireless Phone Service.

"At U.S. Cellular, we understand that our customers want technically superior products and services that compliment their lifestyles," said John Cregier, senior director of data services and strategy for U.S. Cellular. "We believe iPhonebook will help our customers more easily maintain and access contact information on their wireless handsets."

"iPhonebook reflects the desires of the busy mobile professional, working parents, and anyone who needs access to contact information when away from the office or home," said Nick Walker, Xpherix president and CEO. "With iPhonebook, no longer will people need to carry multiple PIM devices, tolerate manual entry, or miss making important calls because they don't have proper contact information. We are pleased that U.S. Cellular is making iPhonebook easily available to its more than 4.3 million customers."

iPhonebook offers one-device convenience for all personal address book phone numbers. The wireless phone display can also be used to browse other personal address book content such as addresses, email addresses and the Notes field, eliminating the need to carry electronic organizers, laptops or bulky address books. Additionally, the Download Contacts feature enables users to populate the phone's built-in phonebook automatically with contacts from the desktop PIM.

With easyedge, U.S. Cellular customers will enjoy more than 60 easy-to-use applications that will make daily life easier and more entertaining. The easyedgeSM Phone Service launch will occur on a staggered schedule that includes east Tennessee and Iowa in September; Wisconsin, Chicago, and central/western Illinois in October; and Missouri, Oklahoma, Nebraska, Indiana and New England in November.

Service for the company's remaining markets will launch as next generation network upgrades occur. By the end of 2003, U.S. Cellular will provide this service to more than 75 percent of its customers.

About U.S. Cellular

U.S. Cellular Corporation, the nation's eighth largest wireless service carrier, provides wireless service to more than 4.3 million customers in 152 markets throughout 26 states. The Chicago-based company operates on a customer satisfaction strategy, meeting customers' needs by providing a comprehensive range of wireless products and services, superior customer support, a high-quality network, and targeted community outreach activities. For more information about U.S. Cellular, visit the company's Web site at www.uscellular.com.